linux-kernel - [PATCH net-next 1/3] octeon_ep: remove dma sync in trasmit path

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Message-ID: <20231023114449.2362147-2-srasheed@marvell.com>
Date:   Mon, 23 Oct 2023 04:44:46 -0700
From:   Shinas Rasheed <srasheed@...vell.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <hgani@...vell.com>, <vimleshk@...vell.com>, <egallen@...hat.com>,
        <mschmidt@...hat.com>, <pabeni@...hat.com>, <horms@...nel.org>,
        <kuba@...nel.org>, <davem@...emloft.net>,
        Shinas Rasheed <srasheed@...vell.com>,
        Veerasenareddy Burru <vburru@...vell.com>,
        "Sathesh Edara" <sedara@...vell.com>,
        Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 1/3] octeon_ep: remove dma sync in trasmit path

Cleanup dma sync calls for scatter gather
mappings in trasmit path

Signed-off-by: Shinas Rasheed <srasheed@...vell.com>
---
 drivers/net/ethernet/marvell/octeon_ep/octep_main.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index 552970c7dec0..bf1e376a4232 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -869,9 +869,6 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
 		if (dma_mapping_error(iq->dev, dma))
 			goto dma_map_err;
 
-		dma_sync_single_for_cpu(iq->dev, tx_buffer->sglist_dma,
-					OCTEP_SGLIST_SIZE_PER_PKT,
-					DMA_TO_DEVICE);
 		memset(sglist, 0, OCTEP_SGLIST_SIZE_PER_PKT);
 		sglist[0].len[3] = len;
 		sglist[0].dma_ptr[0] = dma;
@@ -891,10 +888,6 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
 			frag++;
 			si++;
 		}
-		dma_sync_single_for_device(iq->dev, tx_buffer->sglist_dma,
-					   OCTEP_SGLIST_SIZE_PER_PKT,
-					   DMA_TO_DEVICE);
-
 		hw_desc->dptr = tx_buffer->sglist_dma;
 	}
 
-- 
2.25.1